Improvement in retainers for extension-tubes for gasaliers



J. C. CASSIDY.

RETAINERS FOR EXTENSION-TUBES FOR GASALIERS.

No.181,140, Patented Augu15, 1876 WITNESSES.

AMM M lNVE/VTUR.

N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTDN. D C.

UNITED STATES PATENT OEEIcE.

JOHN C. OASSIDY, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN RETAINERS FOR EXTENSION-TUBES FOR GASALIERS.

' Specification forming part of Letters Patent No. 181,140, dated August15, 1876; application filed March 17, 1876.

To all whom it may concern:

Be it known that 1, JOHN G. OASSIDY, of Brooklyn, Kings county, NewYork, have invented, made, and applied to use Improvements in theConstruction of Retainers for Extension-Tubes of Gasaliers; and that thefollowing is a full, clear, and correct description of the same,reference being had to the accompanying drawings, making part of thisspecification, and to the letters of reference marked thereon, in whichFigure 1 is a sectional view of my improvement in retainers whenthreesprings are used. .Fig. 2 is a sectional view of my improvement inretainers when two springs are used. Fig. 3 is a top view of Fig. 1.Fig. 4 is atop-view of Fig. 2.

In the drawing, like parts of the invention are pointed out by the sameletters of reference.

The nature of the present invention consists in. improvements, as morefully hereinafter set forth, in the construction of retainers forextension-tubes of gasaliers, and relates to ready and efficient meansfor holding the extension-tubes of gasaliers in position at any pointdesired.

To enable those skilled in the arts to make and use my invention, I willdescribe the construction and operation of the same.

A shows a tube or pipe, which may be provided at its lower end with thebasket supportin g the shade and burner of a drop-light.

In the tube A is inserted a tube of smaller diameter to supply gas tothe drop-light when the tube A is drawn down, and forms, as it were, acontinuation of the inner tube. A stuffing-box may be attached to theupper end of the tube A, and be passed over the inner tube to make bothtubes gastight. Over the tube A is passed a short tube or pipe, 0,provided with a coupling, D, atits upper end; or a cap may be usedinstead of the coupling, the coupling being employed when it is desiredto connect a pipe with the chandelierstem, and a supply-of gas is to bepassed through rods for the outside arms. Upon the lower end of the pipeor tube 0 is secured a threaded cap, E, within which cap is inserted awasher, e, made a little smaller in diameter than the interior of thetube 0, and made so that it may enter the tube 0 and have its bearing,when requisite, upon the lower end of the springs F. The cap E isprovided with a circular opening, so that it may be passed over the tubeA, and fit the same snugly, but not too tightly, to prevent the tube Amoving in the same. F show semi-elliptic springs, two or more of whichmay be employed, inserted in the tube or pipe 0, having their upper endsconfined in a collar, (1, properly slotted to receive them, which collard is held in the upper end of the tube or pipe (J, and their lower endsfree and bearing upon the interior of the tube or pipe 0. The curvedportions of the springs F bear upon the outer surface of the tube A, andretain the same in any desired position when drawn down or thrown up.Should the springs at any time become weak the Washer e can be broughtto bear upon the lower ends of the springs, and cause the centralportions of the same to bear upon the tubcA by screwing up the cap-pieceE. Both the collar d and cap-piece E form guides for the tube A whendrawn down or thrown up.

Such being the construction, the operation is as follows: When desiredthat the tube A shall form, as it were, a continuation of the tubeinserted in it, and that gas shall be supplied to the drop-light, thetube A is drawn down the proper distance by the hand of the operator,and is held in this position by the pressure of the springs bearing uponit, and when thrown up after use this pressure of the springs continuesholding the tube A in position. As the tube A is moved up or down it isguided to a certain extent by the collar d and threaded cap E.

Having now set forth my invention, whatI claim as new is Thecombination, with the tube 0, of the slotted collar d, cap E, washer e,and two or more springs, F, constructed and operating substantially asand for the purposes set forth.

JOHN c. OASSIDY.

Witnesses:

A. SIDNEY DOANE, J. V. LUEE.

